Sayyiduna Mu'awiyah bin Haydah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "There is no backbiting (ghibah) regarding an open sinner (fasiq)."
Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains a narrator, al-Ala' bin Bishr, whom al-Azdi declared da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 663
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الامام الطبراني فى معجمه الكبير 418/19»